/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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 */

package org.apache.druid.indexer.partitions;

/**
 * In Druid, ingested data are primarily partitioned based on time range (@link GranularitySpec#getSegmentGranularity),
 * and then secondly partitioned based on the given {@link PartitionsSpec}. This enum lists all supported types for the
 * secondary partitioning.
 */
public enum SecondaryPartitionType
{
  /**
   * Linear partitioning partitions segments in the same time chunk based on their size or number of rows in them.
   *
   * @see DynamicPartitionsSpec
   * @see org.apache.druid.timeline.partition.NumberedShardSpec
   */
  LINEAR,
  /**
   * Hash partitioning partitions segments in the same time chunk based on the hash value of the partition dimensions.
   *
   * @see HashedPartitionsSpec
   * @see org.apache.druid.timeline.partition.HashBasedNumberedShardSpec
   */
  HASH,
  /**
   * Range partitioning partitions segments in the same time chunk based on the value range of the partition dimension.
   *
   * @see DimensionRangePartitionsSpec
   * @see org.apache.druid.timeline.partition.DimensionRangeShardSpec
   */
  RANGE
}
